Sanitary dental impression-tray.



1a. a" BELL. SANITARY DENTAL IMPRESSON TRAY.

Y APPLICATION FILED MAY 21,1914.

Eatented Det. 6, 1914y 2 SHEETS-SHEET 2.

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ED STATES PATENT oiiiioE.

ROSCOE C. BELL, OF MOUNT CARMEL, ILLINOIS.

SANITARY DENTAL .iivirREssioiv-TRAY.

Application led May 21, 1914. Serial N o. 840,077.

iiication.

My invention relates to dental impression 'trays for taking impressions of the mouth in the production of artiiicial' dentures.

The invention consists ofl the features of construction,V combination and arrangement of parts herein fully described and claimed, reference being had to thev accompanying drawings in which l Figure 1 is a top plan view of a full upper impression tray embodying my invention. Fig. 2 is :a similar View yof a full lower im.; pression tray embodying the invention. Fig. 3 -is a side elevation of the tray shown in gFig. 1 Fig. 4.- is a bottom plan view of the same. Fig. 5, is ,a perspective yView of the handle. Fig. 6 is a partial tray made from thetray shownn Fig.-1. Figs. 7, 8 and 9 are views of various types of partial impression trays -made from the tray shown .in

Fig. 2.

4Incarrying my invention into practice, I provide a tray which is formed by means of a die or otherwise from compressed paper.

or like comparatively soft, fibrous material,

:which is, nevertheless suiliciently rigid to -carry the impression material and sustain the force of the bite, and which may be also altered in shape to a requisite extent to suit special conditions and is capable of being cut up or divided for the production of parl tial impression trays. The tray thus made of a compressed ber is rendered moisture proof' in any suitable manner, as by saturating it with oil or other water-proofing sub stances, or coating it with wax, the waterproofing agent serving to give it a desired increase of rigidity so that it will maintain its shape under all normal conditions. The

Y water proofing agent, furthermore, serves to facilitate the easy removal of the impression from the y tray. In the drawings I have shown several different styles of impression trays made of the material mentioned, Fig. l showing a full impression tray l, Fig. a full lower impression tray 2Fig. 6 a partial impressionV tray la cut from the form of tray shown in Fig. l, and Figs. 7, 8 and 9 partial impression trays 2,I 2b and' 2c made from Specification of Letters Patent.

' disclosed therein.

Patented Oct. 6, 1914.

the form' of impression tray shown in Fig. 2.

`trays from the full upperiinpression tray shown therein, while Fig. 2 shows the dotted lines. of out for making` the several forms of partial impression trays shown in Figs. 7, 8 and, 9 from the full lower impression tray It is evident that other shapes or styles of partial impression trays may be made from the trays shown in Figs.

l and 2, those illustrated being simply for purposes of example and as best exemplifying theapplicability of the invention in this particulai-.- It is also evident that the marginal edges of the tray maybe partially cut away, bent or shaped to suit any special conditions, Fig. 2 illustrating in dotted lines a line of cut which may be adopted in cutting away a portion of the marginal inner flange oi"`wall of the tray 2 for a special purpose.

I provide means by which a handle may bedetachably connected with a tray, so that a single handle or set of` handles will serve for continuous use in connection with the trays consecutively employed. The handles used are of novel construction to secure certain beneficial results, and the trays are constructed to receive the handles in a plurality of ways to increase the eliiciency of the tray for use under different conditions.

As shown,' each tray is rovided with headed pins or studs, denote respectively, 3, 4, 5 andl 6, the studs 3 and being arranged on one side of the longitudinal center of the tray and the studs 4 and 6 on the opposite side of the longitudinal center thereof. The upper surfaces of these studs lie flush with the upper surface of the bottom of the tray, while the lower headed ends ofthe studs project sufliciently for engage-` ment with a handle 7, the construction of which is hereinafter described. It will be observed that the studs 3 and 4 are disposed in the bottom of the channel of each tray in transverse alineinent with each other and midway of tl length of the tray, while aoA the studs 5 and 6 are disposed at the forward portion of the tray immediately on opposite sides of the longitudinal center thereof, which arrangement of the studs 1s especially designed for the purpose of .enabling full and partialnpper and lower impression trays to be .interchangeably connected with one andthe same style of handle, the arrangement of the studs further I. the headed ends of the pins or studs 5 and 6 and4 the arms l0 with similarslots 12 for engagement; with the headed ends of the pins or studs 3 and 4, the slots being adapted vvto register with the respective studs when the lengaging end'of the tray is brought into proper position, so Vthat by an endwise movement of the handle in a direction longitndinally ofthe tray the slottedportions of the handle may beengi-ged with ordisengaged from the studs. e width of the slots andthickness of the engaging portion of the handle is such as to secure a firm frictional engagement between the handle and studs, thus obviating any liability of accidental disengagement4 of the tray when applied to the handle,v While at the same time enabling-the handle tobe. applied to and removed 'from the tray Without theneces- L .sity of the use otany materialV amount of force. y 5. n It willbe evident that the described arangement of the ins or stads and the slots in the handle ena les all ythe various styles of full and' partial trays ilhstrated,' and others whichV may-be formed,'to be connected at all times lby at least twoY of the pins or studs with. the handle, a handle of' the' construction described being accordingLy interchangeable for use in connection` with any and all of the various trays which i may he employed. Furthermore, 'itvwillbe evident that by the arrangement of the pins and slots specied, any of the partial impression trays may be firmly supported.-

from the handle, irrespective of the par ticular form or' the tray in question. The

handle is lpreferably stamped up from a singlev piece of sheet metal made et Sterling; or German silver9 or any other suitable mau vterial, which whenet-fei'. necessary may be cated on opposite sides of the longitudinal' 'center of the tray and beyondthe trans-V verse center thereof, and a second pair of'v headed studs projecting from the bottom of the tray on opposite sides of the` longitudinal center thereof and* adjacent to the' rear portion of the tray andjin transverse alinement with each other and. immediately on opposite sides or' the longitudinal centerv of the tray, and a handle comprising a plate having fork arms, the outer ends of said arms being,` provided with'sl'ots to engage the first-named pair of studs and the body' of the plate. between the inner ends of the arms being provided with slots to'engage the second named pair ofheaded studs.

In testimony v'shereol:l I aix my signature in presence of two witnesses.-

y Roscoe c. BELL.

' Witnesses:

-W. H. RoBERsoN, Cam.. A. Sellers. 

